1, first draw from the pouting mouth of the small fish, draw its body outline, and then draw its tail.

2. After drawing the eyes of the small fish at the head position, draw the fins on the side and back of the small fish.

3. After the striped lines are drawn on the body of the small fish, the lines on the tail of the fish are also added.

4. Then paint its eyes black and its body with yellow and red.

5. Finally, paint its fins and tail in blue, and the simple fish will be painted.

Fish knowledge: overfishing, pollution and environmental changes will destroy fish resources, and fish predation will help control mosquito-borne diseases such as malaria. The more advanced group of linear fin fish is called bony fish, which began to evolve in Jurassic and has become the most individual fish. There are also several species of extinct fish. Now do you know more about small fish?

Introduction of fish

Fish is the oldest vertebrate. Some hybrid offspring with different chromosome numbers still have fertility. They inhabit almost all aquatic environments on earth, from fresh lakes and rivers to salty seas and oceans.

Fish are divided into two classes: Annihilis and Jahnoidea. Annihilis includes Circadian and Armor, and Jahnoidea includes Shieldfish, Chondrichthyes and Actinidia. Most fish are temperature-changing vertebrates that live in water all year round, breathe through gills, and use fins to assist their body balance and movement.

There are also African lungfishes, mudskippers and perches that can survive on land for a long time, and snakehead, Monopterus albus and Sparus albus breathe by a single swim. Although most fish are cold-blooded, many sharks and tuna are semi-constant, while moon fish are constant. There are more than 36,000 species of fish in the world.

It accounts for more than half of the named vertebrates, and new species of fish are constantly being discovered, with an average of about 150 species per year, which should have increased by more than 1500 for more than ten years.